Respuesta :
Answer: 1
Step-by-step explanation:
Parallel lines always have the same slope. If you rework the equation x-y=8 into y=mx+b form you will get:
-y=-x+8 and then
y = x - 8
Since a slope of x is just a slope of 1, that means any line parallel to this line will also have a slope of 1.
